My daughters friend asked her to go to her house for a sleepover tomorrow night, usually I would have no problem with that and I would say yes. This time however I know that her parents are away on holiday and it is only her and her brother in the the house. My daughter and her friend are both 12 and the brother has just turned 17. Its nothing to do with the fact that its a boy, its just that I dont think 17 is responsible enough to look after a group of 12 year old girls, so even if it was a 17 year old girl I would still have said no. They usually ask other girls to the sleepover too, but they think their parents are stricter than me, so since I have said no they think the other parents will definately say no so havent bothered to ask them. I have said that they can have the sleepover here, but they want it in the friends house and have said no to me. My daughter now thinks I am being completely unreasonable but I dont, what do you think?